Pneumatic three eccentric butterfly valve is a high-performance butterfly valve. It drives the valve shaft to rotate through various driving devices, and the valve shaft drives the butterfly plate to rotate within 0-90 ° in the valve body channel to achieve the purpose of opening and closing the valve and control the flow medium in the pipeline. The triple eccentric metal hard seal butterfly valve can be widely used in engineering pipelines such as generators, steam, cold and hot air, chemical smelting engineering, power generation, environmental protection, etc. due to its ultra-high performance. Applicable media include various corrosive and non corrosive fluid media.
It has the following advantages:
1. Small size, light weight, excellent cutting performance.
2. The sealing surface of the butterfly plate is designed to be an oblique conical surface with respect to the axis of the butterfly plate, so that there is a certain contact angle between the sealing surface of the butterfly plate and the sealing surface of the valve seat. This contact angle is equal to a slender wedge evenly surrounding its circumferential surface, and the sealing line at the longitudinal direction of the circumference of the butterfly plate is a quasi elliptic curve, both of which play the role of sealing compensation at the same time.
3. When the sealing surface of the butterfly plate is closed, the force is uniform and the pressure bearing capacity is high; During the opening process of the butterfly plate, all points of the sealing surface complete the action of separating from the sealing surface of the valve seat at the same time, without jamming, friction and small opening torque. Therefore, the cost is low, the sealing performance is good, and the service life is long.
4. Various sealing structures are available for selection to ensure service life and reliability. The butterfly valve seal ring has integral soft seal (PTFE, C-TFE, G-TFE), hardened metal plate type, integral+hard alloy, which is suitable for various working conditions.
5. It can realize two-way sealing function, which can be adjusted and cut off.
6. The actuator has low friction, high working efficiency, large thrust and good safety.
7. The design of smart and combined actuator (manual mechanism) can ensure free installation and flexible control in all directions.
8. Simple, eye-catching, reliable and integrated travel indication, combined installation of limit switch and solenoid valve, no external pipeline, reduce leakage points.
9. A variety of actuator forms can be selected to meet different user requirements.
10. Convenient assembly and maintenance, with superior performance price ratio.
